Andrew, you wrote 11/01/2019 00:50:24
Subject: Re: Make dynamic script with long text
Here is an interesting technical documentation issue, which is that I
had no idea this has anything to do with extra-spacing-width, and only
hit on it after long searches of the web and the archives, then based
on somebody's guess. Somehow there needs to be some _explanatory_
document that actually explains these concepts in lilypond, because in
this case and others, it's non-obvious (to my dim consciousness). I'd
seriously offer to write such a text, but I am exactly the wrong person
to do so because I am the one that is baffled still in general by these
internals.
You're right that there is little specific documentation about
extra-spacing-width. It is mentioned only briefly in the Learning
Manual:
see http://lilypond.org/doc/v2.19/Documentation/learning/moving-objects
The problem is that there are far too many of these properties to
document any but a tiny fraction of them with detailed explanations and
examples. The approach we, the documentation writers, adopted was to
attempt to teach people through the Learning Manual how to find
pertinent properties for themselves by using the Internal Manual. Pretty
well the whole of section 4 of the LM is devoted to showing users how to
do this.
For example, look up TextScript in the All layout objects of the
Internals Manual:
http://lilypond.org/doc/v2.19/Documentation/internals/textscript
There you'll find extra-spacing-width and Harm's recipe for setting the
width of an object to zero.
Reading and understanding section 4 of the LM will greatly help you with
your understanding (I hope; at least that was my objective!)
Actually, as to your last point about being baffled, it was my being in
exactly that position several years ago that prompted me to write most
of the LM. I reasoned that as I was in the same position as most new
users I was well-placed to document the initial stages of learning to
use LilyPond as I myself discovered them. That gradually lead to an
understanding of the internals and the LM was the result.
Trevor
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